While they use the same bolt pattern for the engine mounts and many of the external accessories, there are key differences:
* Bore and Stroke: The 305 has a smaller bore and longer stroke than the 350. This means the cylinders are smaller in diameter.
* Internal Components: While some parts *might* interchange, many internal components like pistons, connecting rods, and crankshaft are different sizes and won't be compatible.
* Oil Pump: The oil pumps are not necessarily interchangeable.
* Specific Parts: Some manifolds, oil pans, and other accessories might be unique to each engine.
In short: You can't just swap a 305 for a 350 and expect it to work perfectly. Significant modifications and potentially new parts are likely required. Swapping the engine block itself is often achievable but usually requires adaptation of various parts.
It's crucial to consult a detailed engine parts catalog or a mechanic experienced with these engines before attempting such a swap to ensure compatibility and avoid costly mistakes.
